Happy new year to the wonderful Godot community! We're starting a new decade with a well-established, non-profit, free and open source game engine, and tons of further improvements in the pipeline from hundreds of contributors. Godot will keep getting better, and we're looking forward to all the games that the community will keep developing and releasing with it.
202 lines
5.4 KiB
C++
202 lines
5.4 KiB
C++
/*************************************************************************/
|
|
/* midi_driver_alsamidi.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
|
|
/* */
|
|
/* Permission is hereby granted, free of charge, to any person obtaining */
|
|
/* a copy of this software and associated documentation files (the */
|
|
/* "Software"), to deal in the Software without restriction, including */
|
|
/* without limitation the rights to use, copy, modify, merge, publish, */
|
|
/* distribute, sublicense, and/or sell copies of the Software, and to */
|
|
/* permit persons to whom the Software is furnished to do so, subject to */
|
|
/* the following conditions: */
|
|
/* */
|
|
/* The above copyright notice and this permission notice shall be */
|
|
/* included in all copies or substantial portions of the Software. */
|
|
/* */
|
|
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
|
|
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
|
|
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
|
|
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
|
|
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
|
|
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
|
|
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
|
|
/*************************************************************************/
|
|
|
|
#ifdef ALSAMIDI_ENABLED
|
|
|
|
#include "midi_driver_alsamidi.h"
|
|
|
|
#include "core/os/os.h"
|
|
#include "core/print_string.h"
|
|
|
|
#include <errno.h>
|
|
|
|
static int get_message_size(uint8_t message) {
|
|
switch (message & 0xF0) {
|
|
case 0x80: // note off
|
|
case 0x90: // note on
|
|
case 0xA0: // aftertouch
|
|
case 0xB0: // continuous controller
|
|
return 3;
|
|
|
|
case 0xC0: // patch change
|
|
case 0xD0: // channel pressure
|
|
case 0xE0: // pitch bend
|
|
return 2;
|
|
}
|
|
|
|
return 256;
|
|
}
|
|
|
|
void MIDIDriverALSAMidi::thread_func(void *p_udata) {
|
|
MIDIDriverALSAMidi *md = (MIDIDriverALSAMidi *)p_udata;
|
|
uint64_t timestamp = 0;
|
|
uint8_t buffer[256];
|
|
int expected_size = 255;
|
|
int bytes = 0;
|
|
|
|
while (!md->exit_thread) {
|
|
int ret;
|
|
|
|
md->lock();
|
|
|
|
for (int i = 0; i < md->connected_inputs.size(); i++) {
|
|
snd_rawmidi_t *midi_in = md->connected_inputs[i];
|
|
do {
|
|
uint8_t byte = 0;
|
|
ret = snd_rawmidi_read(midi_in, &byte, 1);
|
|
if (ret < 0) {
|
|
if (ret != -EAGAIN) {
|
|
ERR_PRINTS("snd_rawmidi_read error: " + String(snd_strerror(ret)));
|
|
}
|
|
} else {
|
|
if (byte & 0x80) {
|
|
// Flush previous packet if there is any
|
|
if (bytes) {
|
|
md->receive_input_packet(timestamp, buffer, bytes);
|
|
bytes = 0;
|
|
}
|
|
expected_size = get_message_size(byte);
|
|
}
|
|
|
|
if (bytes < 256) {
|
|
buffer[bytes++] = byte;
|
|
// If we know the size of the current packet receive it if it reached the expected size
|
|
if (bytes >= expected_size) {
|
|
md->receive_input_packet(timestamp, buffer, bytes);
|
|
bytes = 0;
|
|
}
|
|
}
|
|
}
|
|
} while (ret > 0);
|
|
}
|
|
|
|
md->unlock();
|
|
|
|
OS::get_singleton()->delay_usec(1000);
|
|
}
|
|
}
|
|
|
|
Error MIDIDriverALSAMidi::open() {
|
|
|
|
void **hints;
|
|
|
|
if (snd_device_name_hint(-1, "rawmidi", &hints) < 0)
|
|
return ERR_CANT_OPEN;
|
|
|
|
int i = 0;
|
|
for (void **n = hints; *n != NULL; n++) {
|
|
char *name = snd_device_name_get_hint(*n, "NAME");
|
|
|
|
if (name != NULL) {
|
|
snd_rawmidi_t *midi_in;
|
|
int ret = snd_rawmidi_open(&midi_in, NULL, name, SND_RAWMIDI_NONBLOCK);
|
|
if (ret >= 0) {
|
|
connected_inputs.insert(i++, midi_in);
|
|
}
|
|
}
|
|
|
|
if (name != NULL)
|
|
free(name);
|
|
}
|
|
snd_device_name_free_hint(hints);
|
|
|
|
mutex = Mutex::create();
|
|
thread = Thread::create(MIDIDriverALSAMidi::thread_func, this);
|
|
|
|
return OK;
|
|
}
|
|
|
|
void MIDIDriverALSAMidi::close() {
|
|
|
|
if (thread) {
|
|
exit_thread = true;
|
|
Thread::wait_to_finish(thread);
|
|
|
|
memdelete(thread);
|
|
thread = NULL;
|
|
}
|
|
|
|
if (mutex) {
|
|
memdelete(mutex);
|
|
mutex = NULL;
|
|
}
|
|
|
|
for (int i = 0; i < connected_inputs.size(); i++) {
|
|
snd_rawmidi_t *midi_in = connected_inputs[i];
|
|
snd_rawmidi_close(midi_in);
|
|
}
|
|
connected_inputs.clear();
|
|
}
|
|
|
|
void MIDIDriverALSAMidi::lock() const {
|
|
|
|
if (mutex)
|
|
mutex->lock();
|
|
}
|
|
|
|
void MIDIDriverALSAMidi::unlock() const {
|
|
|
|
if (mutex)
|
|
mutex->unlock();
|
|
}
|
|
|
|
PoolStringArray MIDIDriverALSAMidi::get_connected_inputs() {
|
|
|
|
PoolStringArray list;
|
|
|
|
lock();
|
|
for (int i = 0; i < connected_inputs.size(); i++) {
|
|
snd_rawmidi_t *midi_in = connected_inputs[i];
|
|
snd_rawmidi_info_t *info;
|
|
|
|
snd_rawmidi_info_malloc(&info);
|
|
snd_rawmidi_info(midi_in, info);
|
|
list.push_back(snd_rawmidi_info_get_name(info));
|
|
snd_rawmidi_info_free(info);
|
|
}
|
|
unlock();
|
|
|
|
return list;
|
|
}
|
|
|
|
MIDIDriverALSAMidi::MIDIDriverALSAMidi() {
|
|
|
|
mutex = NULL;
|
|
thread = NULL;
|
|
|
|
exit_thread = false;
|
|
}
|
|
|
|
MIDIDriverALSAMidi::~MIDIDriverALSAMidi() {
|
|
|
|
close();
|
|
}
|
|
|
|
#endif // ALSAMIDI_ENABLED
|